Why would Mr. Malfoy sell it: You can come up with any number of reasons, though this idea is more something you put in your story rather than something the story revolves around. Could be he just wants to get rid of it, and rather than giving it to a child he sells it. Hagrid: Who knows if Hagrid is poor, but also I was just throwing out ideas. I wasn't really thinking of having a Harry/Ginny romance at all, but just interact more than in canon. You could have them be friends earlier than canon, or you could go the romance route later.